How to Use
- 1
Enter a width and height to calculate the simplified aspect ratio (e.g. 1920x1080 = 16:9).
- 2
Or select a preset ratio (16:9, 4:3, 1:1) and enter one dimension to calculate the other.
- 3
Results show the ratio, decimal equivalent, and percentage width.
Frequently Asked Questions
What is aspect ratio? ▼
Aspect ratio is the proportional relationship between width and height, expressed as W:H. 16:9 is the standard widescreen ratio for HD video, monitors, and most modern phones in landscape.
How do I maintain aspect ratio when resizing? ▼
Use the Scale section: enter the known ratio and one target dimension, and the calculator gives you the other. For example, scale a 16:9 image to 800px wide and get the correct height of 450px.